<template>
<!-- 全屏组件 -->
  <!-- 放置一个图标 -->
  <div style="display:inline-block">
    <svg-icon :icon-class="isFull ? 'exit-fullscreen' : 'fullscreen'" 
    class="fullscreen" 
    @click="toggleScreen"/>
  </div>
</template>

<script>
// 下包 并且引入包
import screenfull from 'screenfull'
export default {
  name: 'ScreenFull',
  data(){
    return{
    isFull:false
    }
  },
  created() {
  // ESC会改变当前的全屏状态
    // screenfull是插件，它自带事件监听 on
    // screenfull.isFullscreen ：插件自带的属性，表示当前是否处于全屏状态
    screenfull.on('change', () => {
      console.log('当前是否是全屏', screenfull.isFullscreen)
      this.isFull = screenfull.isFullscreen
    })
},
  methods:{
    toggleScreen(){
        // screenfull.toggle()  可以实现全屏和非全屏的切换
        screenfull.toggle()
        this.isFull=!this.isFull
    }
  }
  
}
</script>

<style lang="scss" scoped>
.fullscreen {
  width: 20px;
  height: 20px;
  color: #fff;
  cursor: pointer;
}
</style>